Fault indicator having auxiliary fault sensing winding

A fault indicator for indicating an occurrence of a fault current in an electrical conductor of a monitored cable comprising:

• a housing;
• status indicating means within said housing, said status indicating means having a reset indicating state and a fault indicating state;
• a magnetic pole assembly connecting said housing to said monitored cable;
• a first magnetic core within said magnetic pole assembly, said first magnetic core being responsive to a current in said electrical conductor;
• a second magnetic core within said magnetic pole assembly, said second magnetic core being responsive to said occurrence of said fault current in said electrical conductor;
• a first end of said second magnetic core being adjacent to an inside surface of said first magnetic core and forming a first air gap intermediate said first end and said inside surface of said first magnetic core;
• a second end of said second magnetic core being adjacent to said inside surface of said first magnetic core and forming an additional air gap intermediate said first end;
• reset circuit means for conditioning said status indicating means to said reset indicating state, said reset circuit means including a reset power winding, said reset power winding being wound on said reset power winding, said reset power winding further being energized by said current in said electrical conductor;
• and
• trip circuit means for conditioning said status indicating means to said fault indicating state in response to said occurrence of said fault current in said electrical conductor, said trip circuit means including an auxiliary fault sensing winding independent of said reset power winding, said auxiliary fault sensing winding being disposed within a perimeter of said first magnetic core, said auxiliary fault sensing winding being further wound on said second magnetic core, said auxiliary fault sensing winding further being energized by said fault current in said electrical conductor.